摘要
介绍GB/T 4340.1—2009中测定制绳钢丝维氏硬度及其不确定度评定的方法。以维氏硬度计算公式为数学模型,分析不确定度的来源。按照不确定度的合成原则用2种方法计算,合成标准不确定度分别为9.45(方法1)和8.17(方法 2),以及包含因子为2的扩展不确定度为18.9(方法 1)和16.3(方法 2)。给出制绳钢丝维氏硬度不确定度的2种计算方法。标准一般采用方法 1评定和表达测量不确定度,该方法便捷、结果可靠。
To introduce the method to detect Vickers hardness of steel wire for rope and evaluate uncertainty in GB/T 4340.1-2009, Taking Vickers hardness calculation formula as math model to analyze the source of uncertainty. According to uncertainty synthesis principle, using 2 methods to calculate, the synthesis standard uncertainty are 9.45 ( method. 1 ) and 8.17 ( method 2 ) respectively, the extension uncertainty including factor 2 are 18, 9 ( method 1 ) and 16.3 ( method 2 ). Two methods to calculate Vickers hardness uncertainty of steel wire for rope are given. Adopting method 1 in standard to e- valuate and express measurement uncertainty generally, the method is convenience and fast, and resuh is reliable.
出处
《金属制品》
2012年第2期70-72,共3页
Metal Products
基金
南通市科技计划项目
编号DE2009002
关键词
制绳钢丝
维氏硬度
不确定度
评定
steel wire for rope
Vickers hardness
uncertainty
evaluation